... : building, handhold,decoration Model:201,301,304. 1)stainless steel tube(welded) usded for door,window,guard,rainling etc. 2) ... Hight polished in both side and accurated size Name stainless steel tubeItemsSquare pipes, round pipes, oval pipes, special shaped pipes,empaistic ... %Hardness (HV)<253<253<200<200 Chinese different types of stainless steel pipe for construction use with competitive price